add mime-header to mail

multi-watch.sh

@@ -94,7 +94,22 @@ EOF
     echo "$CLEAN_JSON" > "$STATE_FILE"
 
     if [ -n "$UPDATES_FOUND" ]; then
-        echo -e "Subject: Watchdog Alert\n\n$UPDATES_FOUND" | timeout 30s msmtp "$EMAIL_TO"
+        echo "  📧 Sende Benachrichtigung an $EMAIL_TO..."
+        
+        (
+          echo "To: $EMAIL_TO"
+          echo "Subject: Watchdog Alert"
+          echo "Content-Type: text/plain; charset=utf-8"
+          echo "Content-Transfer-Encoding: 8bit"
+          echo ""
+          echo -e "$UPDATES_FOUND"
+        ) | timeout 30s msmtp "$EMAIL_TO"
+        
+        if [ $? -eq 0 ]; then
+            echo "  ✅ E-Mail erfolgreich versendet."
+        else
+            echo "  ❌ E-Mail Versand fehlgeschlagen!"
+        fi
     fi
 
     echo "Check beendet. Nächster Scan in $INTERVAL s."